Hinge-plate for sewing-machine covers



(No Model.)

W. KLENHA.

v HINGE PLATE FOR SEWING MACHINE COVERS. No. 308,264. Patented Nov. 18, 1884.

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WVESLEY KLENHA, OF CHICAGO, ILLINOIS.

HINGE-PLATE FOR SEWING-MACHINE. COVERS.

SPECIFICATION forming part of Letters Patent No.308,261-, dated November 18, 1884.

Application filed October 8,- 1883. (No model.)

To all whom, it may concern:

Be it known that I, WESLEY KLENHA, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Interlocking Separable Hinge-Plates for Sewing-Machine Cases and similar uses; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to features of construction in the detach ably-interlocking plates sometimes employed to give hinged connection to parts that may frequently require to be separated, and more commonly used for separably joining sewing-machine covers to their tables.

In the accompanying drawings, Figure 1 is a vertical section of a sewing-machine top and a hinged removable cover therefor, the section being taken through the interlocking hinge plates, constructed in accordance with my improvement. Fig. 2 is a'plan view of the lower or eye plate detached, the hole or slot therein being punched, but the projection formed in cutting the slot being unbent. Fig. 3 is a plan view of the hooked plate after be ing punched or formed, and before the projecting portion that is to form the hook is bent to engage with the slot in the opposite or eye plate. Fig. 4 is an under side plan view of the two plates after being completely formed and interlocked, the hooked plate being attached to the lower edge of the cover. Fig. 5

is a perspective view of the completely-formed hooked plate detached. Fig. 6 is a vertical central section of the interlocked plates,show ing the hooked plate partly raised. Fig. 7 is a similar view of the interlocked plates, showing the hooked plate raised to its utmost extent, in which position it serves as a stop to further tilting of the part to which it is applied. A represents the hooked plate, and B the apertured or eye plate.

0 represents the top of a sewing-machine or other table, and D a partial cover for such table. The interlocking-plates are in their general construction and operation, as forming a detachable hinge, similar to others heretofore constructed, being made one with a slot and the other with a bent projection adapted to serve as a stop and hinge, and being detachable when in certain positions, by which it is made possible to entirely separate the cover from the table when desired.

The object of the invention is to provide a construction in which the parts or plates interlock more perfectly with each other, so as to render their accidental detachment or separation less likely to happen under some circumstances, and so as to require that the hinged or movable part shall be lowered further than in previous constructions before the parts will be in position to allow of their being separated.

To this end the hook-plate Ais constructed with an aperture, 6/, in the projection a, that forms the hook, and the slotted plate B is provided with a downward projection, I), at one side of the slot-Z). In the ordinary construction of these plates they will be struck out from sheet metal of proper thickness, and will have the form shown in Figs. 2 and 3, the projection 11 of the plate 13 being formed of metal originall y occupying the position shown in Fig. 2, and subsequently being bent into line with the adjacent wall of the slot, as shown in Figs. 6 and 7.

WVhen the projection a of the plate A is bent to form the hook, the aperture a is brought into the laterally-projecting portion of said book a, giving a shoulder, a that in lifting the plate A barely swings beneath the projection b. WVhen the plate A, or the part to which it is attached, is swung back to the full limit of its movement, orinto the position shown in Fig. 7 the shoulder a having passedjhe proj ection b, rises behind the same, as seen in said Fig. 7. Of course, in the forward orlowering movement of the plate A, or of the cover attached thereto, said shoulder a again swings beneath the end of the projection I); but their engagement, in the manner indicated in Fig. 7, serves to prevent the cover from falling by jarring movement of the machine. A more important effect of the projection b is, however, to bear against the shoulder (0 as indicated in Fig. 6, so as to prevent the, cover from being lifted off or disengaged by the withdrawal of the hook a from the slot 1) until the cover is lowered more nearly into a horizontal position than would otherwisebe required. plate A, said plates A and B being further By reason of this construction the accidental provided with apertures for screws, whereby or unintentional separation of the interlockthey may be applied to parts of an article of 1 ing plates will less frequently occur, though I furniture, substantially as and for the pur- 5 their separation is entirely possible when del poses set forth. i

sired. In testimonythat I claim the foregoing as my I claim as my invention invention I affix my signature in presence of The combination, with the plate A, pro 1 t *o witnesses. vided with about projection, (4, having an up i IVESLEY KLENHA. IO ert-ure, a, of the plate B, provided with a slot W'itnesses:

b, and a downwardly-turned projection, 22, lo- G. CLARENCE PooLE, cated in position to engage the aperture in the I PETER J. ELLIOT. 1 

